US20140253566A1 - Source driving circuit and data transmission method thereof - Google Patents
Source driving circuit and data transmission method thereof Download PDFInfo
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- US20140253566A1 US20140253566A1 US13/959,703 US201313959703A US2014253566A1 US 20140253566 A1 US20140253566 A1 US 20140253566A1 US 201313959703 A US201313959703 A US 201313959703A US 2014253566 A1 US2014253566 A1 US 2014253566A1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/006—Details of the interface to the display terminal
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G3/2096—Details of the interface to the display terminal specific for a flat panel
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0404—Matrix technologies
- G09G2300/0408—Integration of the drivers onto the display substrate
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0275—Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
Definitions
- the instant disclosure relates to a source driving circuit; in particular, to a source driving circuit which is compatible to a displayport interface or an embedded displayport (eDP) interface for a data or signal transmission.
- a source driving circuit which is compatible to a displayport interface or an embedded displayport (eDP) interface for a data or signal transmission.
- eDP embedded displayport
- a digital eDP In comparison to a traditional LVDS interface, a digital eDP has a higher transferring rate, and is suitable for a high-resolution panel; the digital eDP interface also allows a cable number reduced so as to achieve a thin shaped design.
- the eDP utilizes the same protocol as DisplayPort so that it is possible to share an image outputting port of the GPU, and a specification of the latest generation of eDP 1 . 3 may further reduce power consumption of the GPU so as to extend a battery life significantly.
- eDP is an interface especially designed for an embedded system, and is able to transfer large amounts of data with less pin, and provides great flexibility to a design of hardware mechanism, which not only releases more designing space of hinge, but also greatly reduces a complexity of the cable, suitable for a notebook computer, a tablet, or an All-in-one PC; in comparison to an exterior DisplayPort, the specification of the eDP is quite adjustable according to various scenarios.
- the eDP significantly improve defects of the LVDS so that there is no need for the GPU to reserve an image outputting port for an embedded display panel, and a Main Link Lane number and a data transferring rate may be adjusted according to a data transferring amount shown on a display panel;
- AUX Channel of the eDP is also provide an extra channel for GPU to control a various parameter setting on a display panel.
- the instant disclosure provides a source driving circuit, and the source driving circuit is connected to a DisplayPort, wherein a displayport interface receives and transmits an original image data to the source driving circuit, and the source driving circuit includes a first integrated source driver and a second integrated source driver.
- the first integrated source driver is connected to the displayport interface through a flexible printed circuit board, and the second integrated source driver is connected to the first integrated source driver.
- the first integrated source driver includes a first receiving unit, a timing controller, a first source-driving-unit, and a first transmission unit.
- the first receiving unit is connected to and through the displayport interface to receive an original image data, decoding the original image data to an original image data decoded.
- the timing controller is connected to the first receiving unit, and the timing controller receives the original image data decoded and transmitted by the first receiving unit, and transmits a first control signal and a second control signal, wherein the original image data decoded includes a first display data and a second display data.
- the first source-driving-unit is connected to the timing controller to receive the first control signal and the first display data.
- the first transmission unit is connected to the timing controller, and the first transmission unit receives the second display data transmitted by the timing controller.
- the second integrated source driver receives the second control signal transmitted by the timing controller and the second display data transmitted by the first transmission unit.
- a data transmission method of a source driving circuit includes steps as follows: receiving an original image data through a displayport interface, decoding an original image data into an original image data decoded; receiving an original image data decoded by the first receiving unit and transmitted by a timing controller, and transmitting a first control signal and a second control signal, wherein the original image data decoded includes a first display data and a second display data; receiving the first control signal through a first source-driving-unit and receiving the first display data; receiving the second display data transmitted by the timing control through the first transmission unit; and receiving the second control signal transmitted by the timing control through the second integrated source driver and the second display data transmitted by the first transmission unit.
- the source driving circuit and the data transmission method thereof in the embodiment of the instant disclosure are able to proceed a data or signal transmission and reception according to the displayport interface or an embedded displayport interface with an entirely digitalized specification standard.
- the source driving circuit and the data transmission method and the standard specification of the displayport interface or the embedded displayport interface are compatible so as to meet the requirement of a signal transmission and frequency demand brought by a high data transmission rate and high resolution.
- FIG. 1 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure
- FIG. 2 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure
- FIG. 3 shows a schematic block diagram of a source driving circuit corresponding to the embodiment in FIG. 1 ;
- FIG. 4 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure
- FIG. 5 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure.
- FIG. 6 shows a flow chart of a data transmission method of a source driving circuit according to an embodiment of the instant disclosure.
- FIG. 1 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure.
- the source driving circuit 100 includes a first integrated source driver 110 and a second integrated source driver 120 .
- the first integrated source driver 110 is connected to the second integrated source driver 120 through a data transmission interface 140
- the first integrated source driver 110 is connected to a DisplayPort 130 through a flexible printed circuit board (not shown in FIG. 1 ); wherein, the first integrated source driver 110 and the second integrated source driver 120 are equipped on another display panel (not shown in FIG.
- the displayport interface 130 is a whole digitalized interface with a high transmission rate
- the data transmission interface 140 is built inside the first integrated source driver 110 and also built inside the second integrated source driver 120 , and thus a drawing in FIG. 1 is simply for an easy instruction, not to limit the scope of the instant disclosure.
- the first integrated source driver 110 does not need the data transmission interface 140 to be connected to the second integrated source driver 120 , but to be connected to the second integrated source driver 120 through a metal wiring on the display panel for transmitting data or signals.
- the first integrated source driver 110 and the second integrated source driver 120 integrate a traditional timing controller and the source driving unit
- the displayport interface 130 may also be an embedded DisplayPort (eDP) for an application in consuming electronic devices as a display interface, such as a laptop.
- eDP embedded DisplayPort
- traces which are needed inside for a laptop may be reduced to a number of 2-4 so that the trace of interfaces inside a hinge of a traditional laptop will be much less complicated.
- a high speed digital video-audio transmitting interface is a main stream of a video-audio player. Therefore, in the embodiment, when the displayport interface 130 receives an original image data OD (which means a digital video data compressed), the displayport interface 130 is connected to the first integrated source driver 110 through a Main link and an Auxiliary link so as to transmit the original image data OD to the first integrated source driver 110 . After the first integrated source driver 110 receives the original image data OD, the original image data OD will be decoded so as to retrieve an video-audio information and a control signal both carried by the original image data OD.
- an original image data OD which means a digital video data compressed
- the first integrated source driver 110 decodes the original image data OD into an original image data decoded, wherein the original image data decoded includes a first display data and a second display data, wherein the first display data (i.e. a first grey scale voltage value) is pixel transmitted from the first integrated source driver 110 to the display panel so as to display an image, and the second display data (i.e. a second grey scale voltage value) is pixel transmitted from the second integrated source driver 120 to the display panel so as to display an image.
- the first display data i.e. a first grey scale voltage value
- the second display data i.e. a second grey scale voltage value
- the first integrated source driver 110 will transmit the second display data and the control signal to the second integrated source driver 120 through the data transmission interface 140 so as to drive the second integrated source driver 120 , wherein the data transmission interface 140 is a one-to-many interface, such as a Low Voltage Differential Signal (LVDS), Transistor-transistor logic (TTL), a Reduced Swing Differential Signaling (RSDS), or a Multipoint LVDS (mLVDS), or any other interface which is one-to-many supported.
- LVDS Low Voltage Differential Signal
- TTL Transistor-transistor logic
- RSDS Reduced Swing Differential Signaling
- mLVDS Multipoint LVDS
- the first integrated source driver 110 is an active driver (Master driver), but the second integrated source driver 120 is a slave driver, and through the first integrated source driver 110 , it is able to proceed a video image transmission and reception with the displayport interface 130 one by one, and through the first integrated source driver 110 , the required image information and the control signal are transmitted from the data transmission interface 140 to the second integrated source driver 120 . Therefore, the source driving circuit 100 of the instant disclosure is compatible with the displayport interface 130 in the same consuming electronic device, and is able to meet the requirement of a signal transmission and frequency demand brought by a high data transmission rate and high resolution.
- FIG. 3 shows a schematic block diagram of a source driving circuit corresponding to the embodiment in FIG. 1 .
- the source driving circuit 300 includes a first integrated source driver 110 and a second integrated source driver 120 .
- the first integrated source driver 110 includes a first receiving unit 112 , a timing control 114 , a first source-driving-unit 116 , a first transmission unit 118 , and a second receiving unit 119 , wherein in the present embodiment, the first transmission unit 118 and the second receiving unit 119 are built inside a data transmission interface 140 .
- the second integrated source driver 120 includes a third receiving unit 122 , a timing controller 124 , a second source-driving-unit 126 , a second transmission unit 128 , and a fourth receiving unit 129 , wherein in the present embodiment, the second transmission unit 128 and the fourth receiving unit 129 are built inside the data transmission interface 140 .
- the source driving circuit is connected to a displayport interface 130 , wherein the displayport interface 130 receives an original image data OD and transmits to the source driving circuit 300 .
- the first integrated source driver 110 is connected to the displayport interface 130 through a flexible printed circuit board (not shown in FIG. 3 ).
- the second integrated source driver 120 is connected to the first integrated source driver 110 .
- the first receiving unit 112 is connected to the displayport interface 130 .
- the timing controller 114 is connected to the first receiving unit 112 .
- the first source-driving-unit 116 is connected to the timing controller 114 .
- the first transmission unit 118 is connected to the timing controller 114 .
- the fourth receiving unit 129 is connected to the first transmission unit 118 .
- the second source-driving-unit 126 is connected to the fourth receiving unit 129 through the data transmission interface 140 .
- the first integrated source driver 110 connected to the displayport interface 130 is an active driver (Master driver), but the second integrated source driver 120 is a slave driver, the data or the signal that the slave driver receives are all from the active driver 110 .
- any integrated source driver receiving data or signals with the active driver 110 may be the slave driver in the instant disclosure, and thus it is not limited because there is only one second integrated source driver 120 in the present embodiment, the one and only second integrated source driver 120 in the present embodiment is simply for an easy instruction and understanding.
- the first receiving unit 112 decodes the original image data OD into an original image data decoded ODC, and transmits to the timing controller 114 , wherein the original image data decoded ODC includes a first display data DS 1 and a second display data DS 2 .
- the timing controller 114 receives the original image data decoded ODC (i.e.
- the timing controller 114 will accordingly transmit the first control signal CS 1 and the first display data DS 1 to the first source-driving-unit 116 ; in the meantime, the timing controller 114 will transmit the second control signal CS 2 to the second source-driving-unit 126 so as to drive the second source-driving-unit 126 , and transmit the second display data DS 2 to the first transmission unit 118 , and then the first transmission unit 118 transforms the second display data DS 2 from TTL to a differential signal.
- the data transmission interface 140 transmits the second display data DS 2 of differential signal transformed by the first transmission unit 118 to the fourth receiving unit 129 .
- the control signals CS 1 and CS 2 include a polarity signal, a line signal, a simultaneous signal with a frame, and a setting value of register.
- the first integrated source driver 110 will receive two copies of display data DS 1 and DS 2 from the displayport interface 130 , and receive two control signals CS 1 and CS 2 generated by the timing controller 114 , wherein one of the copies of display data DS 1 and a control signal CS 1 will be reserved, but the other copy of display data DS 2 and the control signal CS 2 will be transmitted to the second source-driving-unit 126 of the second integrated source driver 120 .
- the source driving circuit 300 of the embodiment is able to be smoothly compatible with the displayport interface 130 in the same consuming electronic device, and thus is able to meet the requirement of a signal transmission and frequency demand brought by a high data transmission rate and high resolution.
- FIG. 4 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure. It is known from FIG. 4 , there are simply a second source-driving-unit 126 and a fourth receiving unit 129 in a second integrated source driver 120 ; therefore, in the present embodiment, the second integrated source driver 120 may be a regular source driver, and the rest of the work mechanism related to the source driving circuit 400 of the embodiment in FIG. 4 may be referred to the source driving circuit 300 of the embodiment in FIG. 3 , and it is not repeated thereto.
- FIG. 5 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure. It is known from FIG. 5 , in comparison to the embodiment in FIG. 4 , there is no need of a second receiving unit 119 in a first integrated source driver 110 , and thus, in the embodiment in FIG. 5 , a source driving circuit 500 is not only able to achieve a predetermined demand of function, but also able to further reduce a circuit designing cost. The rest of the work mechanism related to the source driving circuit 500 of the embodiment in FIG. 5 may be referred to the source driving circuit 300 of the embodiment in FIG. 3 , and it is not repeated thereto.
- FIG. 6 shows a flow chart of a data transmission method of a source driving circuit according to an embodiment of the instant disclosure.
- the method of the embodiment may be executed with source driving circuits 300 , 400 , and 500 in FIGS. 3-5 , and thus please refer to FIGS. 3-5 together for a better understanding.
- a data transmission method of a source driving circuit includes steps as follows: receiving an original image data through a displayport interface, decoding an original image data into an original image data decoded (S 610 ); receiving an original image data decoded by the first receiving unit and transmitted by a timing controller, and transmitting a first control signal and a second control signal, wherein the original image data decoded includes a first display data and a second display data (S 620 ); receiving the first control signal through a first source-driving-unit and receiving the first display data (S 630 ); receiving the second display data transmitted by the timing controller through the first transmission unit (S 640 ); receiving the second control signal transmitted by the timing controller through the second integrated source driver and the second display data transmitted by the first transmission unit (S 650 ).
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Abstract
Description
- 1. Field of the Disclosure
- The instant disclosure relates to a source driving circuit; in particular, to a source driving circuit which is compatible to a displayport interface or an embedded displayport (eDP) interface for a data or signal transmission.
- 2. Description of Related Art
- In recent years, manufactures have been in a competition of specifications of laptops and tablets from a hard disk size, to a central processing unit (CPU) speed, and to an increase of screen resolution. Branded manufacturers not only equip their products with panels of an upgrading level from a (1,366×768) high-definition (HD) to a full high-definition (1,920×1,080), but also begin to import a three-dimensional (3D) display function, which leads to a result that an image of traditional interface and design structure becomes less satisfying, and a more state-of-the-art digital interface is required for a high-speed video signal communication between a screen and the graphics processor (GPU), and also required for supporting demand of a higher resolution. In comparison to a traditional LVDS interface, a digital eDP has a higher transferring rate, and is suitable for a high-resolution panel; the digital eDP interface also allows a cable number reduced so as to achieve a thin shaped design. In addition, the eDP utilizes the same protocol as DisplayPort so that it is possible to share an image outputting port of the GPU, and a specification of the latest generation of eDP 1.3 may further reduce power consumption of the GPU so as to extend a battery life significantly.
- eDP is an interface especially designed for an embedded system, and is able to transfer large amounts of data with less pin, and provides great flexibility to a design of hardware mechanism, which not only releases more designing space of hinge, but also greatly reduces a complexity of the cable, suitable for a notebook computer, a tablet, or an All-in-one PC; in comparison to an exterior DisplayPort, the specification of the eDP is quite adjustable according to various scenarios. In particular, the eDP significantly improve defects of the LVDS so that there is no need for the GPU to reserve an image outputting port for an embedded display panel, and a Main Link Lane number and a data transferring rate may be adjusted according to a data transferring amount shown on a display panel; AUX Channel of the eDP is also provide an extra channel for GPU to control a various parameter setting on a display panel.
- However, under a structure that a timing controller integrated to a source driver, a connecting method of the traditional LVDS is not working for a protocol of DP/eDP, and thus this inconsistent specification between new and old hardware may lead to a problem of incompatibility of hardware.
- The instant disclosure provides a source driving circuit, and the source driving circuit is connected to a DisplayPort, wherein a displayport interface receives and transmits an original image data to the source driving circuit, and the source driving circuit includes a first integrated source driver and a second integrated source driver. The first integrated source driver is connected to the displayport interface through a flexible printed circuit board, and the second integrated source driver is connected to the first integrated source driver. The first integrated source driver includes a first receiving unit, a timing controller, a first source-driving-unit, and a first transmission unit. The first receiving unit is connected to and through the displayport interface to receive an original image data, decoding the original image data to an original image data decoded. The timing controller is connected to the first receiving unit, and the timing controller receives the original image data decoded and transmitted by the first receiving unit, and transmits a first control signal and a second control signal, wherein the original image data decoded includes a first display data and a second display data. The first source-driving-unit is connected to the timing controller to receive the first control signal and the first display data. The first transmission unit is connected to the timing controller, and the first transmission unit receives the second display data transmitted by the timing controller. The second integrated source driver receives the second control signal transmitted by the timing controller and the second display data transmitted by the first transmission unit.
- In an embodiment of the instant disclosure, a data transmission method of a source driving circuit is provided, and the data transmission method include steps as follows: receiving an original image data through a displayport interface, decoding an original image data into an original image data decoded; receiving an original image data decoded by the first receiving unit and transmitted by a timing controller, and transmitting a first control signal and a second control signal, wherein the original image data decoded includes a first display data and a second display data; receiving the first control signal through a first source-driving-unit and receiving the first display data; receiving the second display data transmitted by the timing control through the first transmission unit; and receiving the second control signal transmitted by the timing control through the second integrated source driver and the second display data transmitted by the first transmission unit.
- To sum up, with the timing controller integrated to the source driving circuit, the source driving circuit and the data transmission method thereof in the embodiment of the instant disclosure are able to proceed a data or signal transmission and reception according to the displayport interface or an embedded displayport interface with an entirely digitalized specification standard. In other words, the source driving circuit and the data transmission method and the standard specification of the displayport interface or the embedded displayport interface are compatible so as to meet the requirement of a signal transmission and frequency demand brought by a high data transmission rate and high resolution.
- For further understanding of the instant disclosure, reference is made to the following detailed description illustrating the embodiments and examples of the instant disclosure. The description is only for illustrating the instant disclosure, not for limiting the scope of the claim.
-
FIG. 1 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure; -
FIG. 2 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure; -
FIG. 3 shows a schematic block diagram of a source driving circuit corresponding to the embodiment inFIG. 1 ; -
FIG. 4 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure; -
FIG. 5 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure; and -
FIG. 6 shows a flow chart of a data transmission method of a source driving circuit according to an embodiment of the instant disclosure. - The aforementioned illustrations and following detailed descriptions are exemplary for the purpose of further explaining the scope of the instant disclosure. Other objectives and advantages related to the instant disclosure will be illustrated in the subsequent descriptions and appended drawings. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.
- It will be understood that, although the terms first, second, third, and the like, may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only to distinguish one element, component, region, layer or section from another region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the instant disclosure. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
- Referring to
FIG. 1 ,FIG. 1 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure. As shown inFIG. 1 , thesource driving circuit 100 includes a first integratedsource driver 110 and a second integratedsource driver 120. In the present embodiment, the first integratedsource driver 110 is connected to the second integratedsource driver 120 through adata transmission interface 140, and the first integratedsource driver 110 is connected to a DisplayPort 130 through a flexible printed circuit board (not shown inFIG. 1 ); wherein, the first integratedsource driver 110 and the second integratedsource driver 120 are equipped on another display panel (not shown inFIG. 1 ), wherein thedisplayport interface 130 is a whole digitalized interface with a high transmission rate, and in an embodiment, thedata transmission interface 140 is built inside the first integratedsource driver 110 and also built inside the second integratedsource driver 120, and thus a drawing inFIG. 1 is simply for an easy instruction, not to limit the scope of the instant disclosure. In it worth mentioning that, in another embodiment, the first integratedsource driver 110 does not need thedata transmission interface 140 to be connected to the second integratedsource driver 120, but to be connected to the second integratedsource driver 120 through a metal wiring on the display panel for transmitting data or signals. In addition, in the present embodiment, the first integratedsource driver 110 and the second integratedsource driver 120 integrate a traditional timing controller and the source driving unit, and thedisplayport interface 130 may also be an embedded DisplayPort (eDP) for an application in consuming electronic devices as a display interface, such as a laptop. As for a specification of the eDP of a laptop, traces which are needed inside for a laptop may be reduced to a number of 2-4 so that the trace of interfaces inside a hinge of a traditional laptop will be much less complicated. - In the following teaching, there is further instruction in a work mechanism of the
source driving circuit 100 of the instant disclosure. The following instruction is taken example of specification of a displayport interface of a regular display device, and so as the specification of an embedded displayport interface of a laptop, and it is not repeated thereto. - People skilled in the art should be able to realize that a high speed digital video-audio transmitting interface is a main stream of a video-audio player. Therefore, in the embodiment, when the
displayport interface 130 receives an original image data OD (which means a digital video data compressed), thedisplayport interface 130 is connected to the first integratedsource driver 110 through a Main link and an Auxiliary link so as to transmit the original image data OD to the first integratedsource driver 110. After the first integratedsource driver 110 receives the original image data OD, the original image data OD will be decoded so as to retrieve an video-audio information and a control signal both carried by the original image data OD. In the present embodiment, the first integratedsource driver 110 decodes the original image data OD into an original image data decoded, wherein the original image data decoded includes a first display data and a second display data, wherein the first display data (i.e. a first grey scale voltage value) is pixel transmitted from the first integratedsource driver 110 to the display panel so as to display an image, and the second display data (i.e. a second grey scale voltage value) is pixel transmitted from the second integratedsource driver 120 to the display panel so as to display an image. Afterwards, the first integratedsource driver 110 will transmit the second display data and the control signal to the second integratedsource driver 120 through thedata transmission interface 140 so as to drive the second integratedsource driver 120, wherein thedata transmission interface 140 is a one-to-many interface, such as a Low Voltage Differential Signal (LVDS), Transistor-transistor logic (TTL), a Reduced Swing Differential Signaling (RSDS), or a Multipoint LVDS (mLVDS), or any other interface which is one-to-many supported. - It is worth noticing that, in the present disclosure, the first integrated
source driver 110 is an active driver (Master driver), but the second integratedsource driver 120 is a slave driver, and through the first integratedsource driver 110, it is able to proceed a video image transmission and reception with thedisplayport interface 130 one by one, and through the first integratedsource driver 110, the required image information and the control signal are transmitted from thedata transmission interface 140 to the second integratedsource driver 120. Therefore, thesource driving circuit 100 of the instant disclosure is compatible with thedisplayport interface 130 in the same consuming electronic device, and is able to meet the requirement of a signal transmission and frequency demand brought by a high data transmission rate and high resolution. - Referring to
FIG. 2 ,FIG. 2 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure. In the present embodiment, different from the embodiment inFIG. 1 , the first integratedsource driver 110 does not need thedata transmission interface 140 as shown inFIG. 1 to transmit a display data and a control signal to the second integratedsource driver 120. Furthermore, the first integratedsource driver 110 transmits the data and the signal to the second integratedsource driver 120 through a wiring on the display panel, so that a circuit cost related to the configuration of thedata transmission interface 140 is cut down. The rest of the work mechanism of thesource driving circuit 200 in the present embodiment is identical to or similar to thesource driving circuit 100 of the embodiment inFIG. 1 as recited above, and thus it is not repeated thereto. - There is further instruction in teaching a detailed circuit block and a related operation of the
source driving circuit 100 of the embodiment inFIG. 1 . As for a detailed operation of the embodiment inFIG. 2 , a work mechanism shown inFIG. 3 also helps in understanding the instant disclosure. - Referring to
FIG. 3 ,FIG. 3 shows a schematic block diagram of a source driving circuit corresponding to the embodiment inFIG. 1 . As shown inFIG. 3 , thesource driving circuit 300 includes a first integratedsource driver 110 and a second integratedsource driver 120. The first integratedsource driver 110 includes afirst receiving unit 112, atiming control 114, a first source-driving-unit 116, afirst transmission unit 118, and asecond receiving unit 119, wherein in the present embodiment, thefirst transmission unit 118 and thesecond receiving unit 119 are built inside adata transmission interface 140. The secondintegrated source driver 120 includes athird receiving unit 122, atiming controller 124, a second source-driving-unit 126, asecond transmission unit 128, and afourth receiving unit 129, wherein in the present embodiment, thesecond transmission unit 128 and thefourth receiving unit 129 are built inside thedata transmission interface 140. - In the present embodiment, the source driving circuit is connected to a
displayport interface 130, wherein thedisplayport interface 130 receives an original image data OD and transmits to thesource driving circuit 300. The firstintegrated source driver 110 is connected to thedisplayport interface 130 through a flexible printed circuit board (not shown inFIG. 3 ). The secondintegrated source driver 120 is connected to the firstintegrated source driver 110. Thefirst receiving unit 112 is connected to thedisplayport interface 130. Thetiming controller 114 is connected to thefirst receiving unit 112. The first source-driving-unit 116 is connected to thetiming controller 114. Thefirst transmission unit 118 is connected to thetiming controller 114. Thefourth receiving unit 129 is connected to thefirst transmission unit 118. The second source-driving-unit 126 is connected to thefourth receiving unit 129 through thedata transmission interface 140. - It is worth noticing that, the first
integrated source driver 110 connected to thedisplayport interface 130 is an active driver (Master driver), but the secondintegrated source driver 120 is a slave driver, the data or the signal that the slave driver receives are all from theactive driver 110. Thus, in another embodiment, any integrated source driver receiving data or signals with theactive driver 110 may be the slave driver in the instant disclosure, and thus it is not limited because there is only one secondintegrated source driver 120 in the present embodiment, the one and only second integratedsource driver 120 in the present embodiment is simply for an easy instruction and understanding. - Referring to
FIG. 3 as well, after thefirst receiving unit 112 receives the original image data OD through thedisplayport interface 130, thefirst receiving unit 112 decodes the original image data OD into an original image data decoded ODC, and transmits to thetiming controller 114, wherein the original image data decoded ODC includes a first display data DS1 and a second display data DS2. Thetiming controller 114 receives the original image data decoded ODC (i.e. the first display data DS1 and the second display data DS2) transmitted by thefirst receiving unit 112, thetiming controller 114 will accordingly transmit the first control signal CS1 and the first display data DS 1 to the first source-driving-unit 116; in the meantime, thetiming controller 114 will transmit the second control signal CS2 to the second source-driving-unit 126 so as to drive the second source-driving-unit 126, and transmit the second display data DS2 to thefirst transmission unit 118, and then thefirst transmission unit 118 transforms the second display data DS2 from TTL to a differential signal. Afterwards, thedata transmission interface 140 transmits the second display data DS2 of differential signal transformed by thefirst transmission unit 118 to thefourth receiving unit 129. Among which, the control signals CS1 and CS2 include a polarity signal, a line signal, a simultaneous signal with a frame, and a setting value of register. In other words, in the present embodiment, the firstintegrated source driver 110 will receive two copies of display data DS1 and DS2 from thedisplayport interface 130, and receive two control signals CS1 and CS2 generated by thetiming controller 114, wherein one of the copies of display data DS1 and a control signal CS1 will be reserved, but the other copy of display data DS2 and the control signal CS2 will be transmitted to the second source-driving-unit 126 of the secondintegrated source driver 120. Accordingly, thesource driving circuit 300 of the embodiment is able to be smoothly compatible with thedisplayport interface 130 in the same consuming electronic device, and thus is able to meet the requirement of a signal transmission and frequency demand brought by a high data transmission rate and high resolution. - Moreover, it is worth mentioning that it is to be realized from a work mechanism of the source driving circuit of the embodiment in
FIG. 3 , since there is no need of the function of a circuit for thesecond receiving unit 119 inside the firstintegrated source driver 110, and for thethird receiving unit 122, and for thetiming controller 124, and also for thesecond transmission unit 128 inside the secondintegrated source driver 120, and thus a user may switch the circuit blocks off to reduce power consumption. - Furthermore, in another embodiment, please refer to
FIG. 4 ,FIG. 4 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure. It is known fromFIG. 4 , there are simply a second source-driving-unit 126 and afourth receiving unit 129 in a secondintegrated source driver 120; therefore, in the present embodiment, the secondintegrated source driver 120 may be a regular source driver, and the rest of the work mechanism related to thesource driving circuit 400 of the embodiment inFIG. 4 may be referred to thesource driving circuit 300 of the embodiment inFIG. 3 , and it is not repeated thereto. - At last, in another embodiment, please refer to
FIGS. 4 and 5 together,FIG. 5 shows a schematic block diagram of a source driving circuit according to an embodiment of the instant disclosure. It is known fromFIG. 5 , in comparison to the embodiment inFIG. 4 , there is no need of asecond receiving unit 119 in a firstintegrated source driver 110, and thus, in the embodiment inFIG. 5 , asource driving circuit 500 is not only able to achieve a predetermined demand of function, but also able to further reduce a circuit designing cost. The rest of the work mechanism related to thesource driving circuit 500 of the embodiment inFIG. 5 may be referred to thesource driving circuit 300 of the embodiment inFIG. 3 , and it is not repeated thereto. - Referring to
FIG. 6 ,FIG. 6 shows a flow chart of a data transmission method of a source driving circuit according to an embodiment of the instant disclosure. The method of the embodiment may be executed withsource driving circuits FIGS. 3-5 , and thus please refer toFIGS. 3-5 together for a better understanding. A data transmission method of a source driving circuit includes steps as follows: receiving an original image data through a displayport interface, decoding an original image data into an original image data decoded (S610); receiving an original image data decoded by the first receiving unit and transmitted by a timing controller, and transmitting a first control signal and a second control signal, wherein the original image data decoded includes a first display data and a second display data (S620); receiving the first control signal through a first source-driving-unit and receiving the first display data (S630); receiving the second display data transmitted by the timing controller through the first transmission unit (S640); receiving the second control signal transmitted by the timing controller through the second integrated source driver and the second display data transmitted by the first transmission unit (S650). - Related details of steps of the data transmission method of the source driving circuit are described in the embodiments in
FIGS. 1-5 as recited above, and it is not repeated thereto. - It is to be clarified that steps of the embodiment in
FIG. 6 are simply for an easy instruction, and thus a sequence of the steps is not used as a condition for every embodiment of the instant disclosure. - The descriptions illustrated supra set forth simply the preferred embodiments of the instant disclosure; however, the characteristics of the instant disclosure are by no means restricted thereto. All changes, alternations, or modifications conveniently considered by those skilled in the art are deemed to be encompassed within the scope of the instant disclosure delineated by the following claims.
Claims (10)
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TW102108516A TWI557705B (en) | 2013-03-11 | 2013-03-11 | Source driving circuit and data transmission method thereof |
TW102108516 | 2013-03-11 | ||
TW102108516A | 2013-03-11 |
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US20160155421A1 (en) * | 2014-12-01 | 2016-06-02 | Dong-Heon HAN | Display driver integrated circuit and display device including the same |
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US11532256B2 (en) * | 2019-12-20 | 2022-12-20 | K-Tronics (Suzhou) Technology Co., Ltd. | Display assembly, display apparatus, and display method and transmission method of data signal |
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JP2019113672A (en) * | 2017-12-22 | 2019-07-11 | シャープ株式会社 | Display controller, display device, and method for control |
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US20140028726A1 (en) * | 2012-07-30 | 2014-01-30 | Nvidia Corporation | Wireless data transfer based spanning, extending and/or cloning of display data across a plurality of computing devices |
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Also Published As
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TWI557705B (en) | 2016-11-11 |
CN104050908B (en) | 2016-08-17 |
CN104050908A (en) | 2014-09-17 |
US9299315B2 (en) | 2016-03-29 |
TW201435834A (en) | 2014-09-16 |
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